Importance of electron-impurity scattering for electron transport in terahertz quantum-cascade lasers

2004 ◽  
Vol 84 (5) ◽  
pp. 645-647 ◽  
Author(s):  
Hans Callebaut ◽  
Sushil Kumar ◽  
Benjamin S. Williams ◽  
Qing Hu ◽  
John L. Reno
Keyword(s):  
Electron Transport ◽  
Quantum Cascade Lasers ◽  
Impurity Scattering ◽  
Quantum Cascade ◽  
Cascade Lasers

Comparative Analysis of λ≈9µm GaAs/AlGaAs Quantum Cascade Lasers with Different Injector Doping

2006 ◽  
Vol 518 ◽  
pp. 29-34
Author(s):  
D. Indjin ◽  
S. Höfling ◽  
A. Mirčetić ◽  
V.D. Jovanović ◽  
J. Radovanović ◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Quantum Cascade Lasers ◽  
Optical Power ◽  
Impurity Scattering ◽  
Resonance Structure ◽  
Quantum Cascade ◽  
Scattering Rate ◽  
Current Saturation ◽  
Single Temperature ◽  
Cascade Lasers

An experimental and theoretical comparative analysis of the output characteristics of λ ≈ 9m GaAs/Al0.45Ga0.55As quantum cascade lasers based on single and double phonon resonance depopulation mechanisms were presented. The layer structures were grown with solid source molecular beam epitaxy and consist of 48 or 36 active stages embedded in a symmetrical plasmon enhanced waveguide. From the wafers, ridge waveguide lasers were fabricated by optical lithography and dry etching. The theoretical model is based on a fully non-equilibrium Schrödinger- Poisson self-consistent analysis of the coupled scattering rate and single-temperature energy balance equations, taking all relevant electron-LO phonon, electron-electron and electron-ionised impurity scattering processes into account. Single phonon resonance devices exhibit clear current saturation, simultaneously with a decrease of the optical power. In the moderate doping regime, a quasi-linear dependence of both the threshold and saturation current densities on injector doping, were measured, in a very good agreement with theoretical predictions. Double phonon resonance lasers exhibit ‘saturation’ mechanism evident from their decrease in optical power, but without pronounced current saturation. Previously reported saturation of the ‘maximal’ current under higher injector doping in single phonon resonance lasers, is also observed in the double phonon resonance structure for injector sheet doping above 8x1011cm-2.

Nonequilibrium optical phonon generation by steady-state electron transport in quantum-cascade lasers

2002 ◽  
Vol 80 (23) ◽  
pp. 4303-4305 ◽  
Author(s):  
Vincenzo Spagnolo ◽  
Gaetano Scamarcio ◽  
Mariano Troccoli ◽  
Federico Capasso ◽  
Claire Gmachl ◽  
...  
Keyword(s):  
Steady State ◽  
Electron Transport ◽  
Optical Phonon ◽  
Quantum Cascade Lasers ◽  
Quantum Cascade ◽  
State Electron ◽  
Phonon Generation ◽  
Cascade Lasers

scholarly journals Indirect pump scheme for quantum cascade lasers: dynamics of electron-transport and very high T0-values

2008 ◽  
Vol 16 (25) ◽  
pp. 20748 ◽  
Author(s):  
Masamichi Yamanishi ◽  
Kazuue Fujita ◽  
Tadataka Edamura ◽  
Hirofumi Kan
Keyword(s):  
Electron Transport ◽  
Quantum Cascade Lasers ◽  
Quantum Cascade ◽  
Cascade Lasers ◽  
Very High

scholarly journals A comprehensive model of gain recovery due to unipolar electron transport after a short optical pulse in quantum cascade lasers

2016 ◽  
Vol 120 (15) ◽  
pp. 154502
Author(s):  
S. E. Jamali Mahabadi ◽  
Yue Hu ◽  
Muhammad Anisuzzaman Talukder ◽  
Thomas F. Carruthers ◽  
Curtis R. Menyuk
Keyword(s):  
Electron Transport ◽  
Optical Pulse ◽  
Quantum Cascade Lasers ◽  
Comprehensive Model ◽  
Quantum Cascade ◽  
Short Optical Pulse ◽  
Cascade Lasers ◽  
Gain Recovery

Electron transport in quantum cascade lasers in a magnetic field

2006 ◽  
Vol 73 (7) ◽  
Author(s):  
Ivana Savić ◽  
Zoran Ikonić ◽  
Vitomir Milanović ◽  
Nenad Vukmirović ◽  
Vladimir D. Jovanović ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Electron Transport ◽  
Quantum Cascade Lasers ◽  
Quantum Cascade ◽  
Cascade Lasers
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